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Optics Letters

Optics Letters


  • Vol. 27, Iss. 21 — Nov. 1, 2002
  • pp: 1878–1880

Cavity-enhanced spectroscopy in optical fibers

Manish Gupta, Hong Jiao, and Anthony O'Keefe  »View Author Affiliations

Optics Letters, Vol. 27, Issue 21, pp. 1878-1880 (2002)

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Cavity-enhanced methods have been extended to fiber optics by use of fiber Bragg gratings (FBGs) as reflectors. High-finesse fiber cavities were fabricated from FBGs made in both germanium/boron-co-doped photosensitive fiber and hydrogen-loaded Corning SMF-28 fiber. Optical losses in these cavities were determined from the measured Fabry–Perot transmission spectra and cavity ring-down spectroscopy. For a 10-m-long single-mode fiber cavity, ring-down times in excess of 2 ms were observed at 1563.6 nm, and individual laser pulses were resolved. An evanescent-wave access block was produced within a fiber cavity, and an enhanced sensitivity to optical loss was observed as the external medium’s refractive index was altered.

© 2002 Optical Society of America

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(300.1030) Spectroscopy : Absorption

Manish Gupta, Hong Jiao, and Anthony O'Keefe, "Cavity-enhanced spectroscopy in optical fibers," Opt. Lett. 27, 1878-1880 (2002)

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